save.php

if (isset($_POST['email']) && ($emailQuery->rowCount() === 0) ) {
//zdefiniowanie zmiennej $email
$email = filter_input(INPUT_POST, 'email', FILTER_VALIDATE_EMAIL);

//if email is not correct syntax
	if (empty($email)) {

//nie powiodlo sie echo $_POST['email']. "<br/>" .$email;
$_SESSION['given_email'] = $_POST['email'];
$_SESSION['new_email'] = $emailQuery->rowCount();
header('Location: index.php');